If I am having twins, will I have two placentas?

Depends--eggs, split. Twins from two eggs have two placentas (occasionally appear fused). Some twins from one egg have two and some have only one placental mass, even though there may be two amniotic sacs. In the past placentas were evaluated at delivery. Now we can learn lots by ultrasound. Occasionally additional testing is needed after delivery to determine if one placental mass or two closely positioned placentas.
Ask for ultrasound. This is a complex topic so i answered it three ways https://www.Healthtap.Com/user_questions/4130 bottom line, it depends on number of eggs & time of cleavage 2 eggs 2 placentas 2 sacs (dizygotic dz, dichorionic-diamniotic) 1 egg 2 placentas 2 sacs (monozygotic mz, di-di) 1 egg 1 placental mass 2 sacs (mz monochorionic-diamniotic) 1 egg 1 placental mass 1 sac (mz monochorionic-monoamniotic).
Yes. All fraternal (non-identical ) twins have their own placentas. Some identical twins do share a placenta and a bag of water; this is the least common type of twin pregnancy and can be identified by ultrasound. Identical twins that share placenta and bag of water are at high risk of complications.
Yes. Usually yes but not always. Sometimes with twins, they can share one placenta. This is best seen on early ultrasounds.
Yes. Twins will have two placentas. In some cases, the placentas grow next to each other and can "fuse", seeming to join into one large placenta with two cords. In some cases of identical twins, some of the membranes can be shared; those placentas are always fused.
Yes. Some twin pregnancies have clearly separate placenta. Some twin pregnancies share the same placenta. And sometimes there can be 2 placenta that share the same blood supply. When you have twins it is very important for your doctor to know what type of placentas you have by looking on your ultrasound.
Yes. Most twins are dichorionic meaning each twin has his or her own placenta. The placentas are frequently fused and deliver together, but the vasculature of each placental bed is separate. Monochorionic twins share a placenta and may have connections between each twin's blood supply.
Yes. If the babies developed because 2 different eggs were fertilized forming 2 different embryos, there will always be 2 placentas. If, however, an egg was fertilized, formed an embryo, and then divided into 2 identical embryos, there may be 1 or 2 placentas, depending on what stage of development the embryo was at when it split into 2 identical parts.
Yes. Two placentas (though often fused into appearing as one) occur if your twins are from 2 eggs (non-identical), or if one fertilized egg that splits early into two completely separate pregnancies. While interesting it's of little significance regarding babies outcomes.
Yes. Most twins each have their own placenta. If they are dizygotic (fraternal) twins, there will be two placentas, although the placentas can fuse together. Monozygotic (identical) twins can share a single placenta or each have their own, depending on how early the embryo splits. These can also fuse together or remain completely separate.